The orcs were one of the few races that existed in the world before the rifts. Little is known about how the orcs interacted with the Elven Empire before the war, but it is remembered that they fought on both sides of the conflict between the elves and dwarves.
After the war, orcs formed tribal communities throughout the world, but they were gradually pushed out and eliminated from most places as human civilization expanded. Scattered tribes remain from place to place, but the orcish tribes are now limited to the Wild Lands.
The orcs are primitive, but the true thing that keeps them in constant conflict with each other and all else around them is the infamous orcish rage. Orcs simply cannot help themselves at escalating conflicts to violence. Orcish warriors in battle are even known to go berserk, unable to differentiate friend from foe.